21578512

素因数分解:

$2^4\times {\mathrm{109}}^1\times {\mathrm{12373}}^1$

素因数の和:12490

約数の個数: 20

約数和(自身を含む): 42195340

約数和(自身を除く): 20616828

約数列:

[1, 2, 4, 8, 16, 109, 218, 436, 872, 1744, 12373, 24746, 49492, 98984, 197968, 1348657, 2697314, 5394628, 10789256, 21578512]

約数ペア:

[(1, 21578512), (2, 10789256), (4, 5394628), (8, 2697314), (16, 1348657), (109, 197968), (218, 98984), (436, 49492), (872, 24746), (1744, 12373)]